题解 | #截取出年龄#
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
select age
, count(1) as number
from (select substring_index(substring_index(profile, ',', -2), ',', 1) as age
from user_submit) as f
group by age
截取出年龄
https://www.nowcoder.com/practice/b8d8a87fe1fc415c96f355dc62bdd12f
select age
, count(1) as number
from (select substring_index(substring_index(profile, ',', -2), ',', 1) as age
from user_submit) as f
group by age
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